undefined4 dhcp6_ctl_readcommand(int param_1)

{

  ssize_t sVar1;

  int *piVar2;

  char *pcVar3;

  int iVar4;

  uint uVar5;

  uint uVar6;

  int *piVar7;

  int *piVar8;

  piVar7 = DAT_0043cdd4;

  if (DAT_0043cdd4 != (int *)0x0) {

    do {

      uVar5 = piVar7[2];

      piVar8 = (int *)*piVar7;

      if ((*(int *)(param_1 + (uVar5 >> 5) * 4) >> (uVar5 & 0x1f) & 1U) != 0) {

        sVar1 = read(uVar5,(void *)((int)piVar7 + piVar7[0x104] + 0xc),piVar7[0x103] - piVar7[0x104]

                    )   //possible issue identified - semgrep

        if (sVar1 < 0) {

          piVar2 = __errno_location();

          pcVar3 = strerror(*piVar2);

          dprintf(4,"dhcp6_ctl_readcommand","read failed: %s",pcVar3);

LAB_00419998:

          iVar4 = *piVar7;

          if (iVar4 == 0) goto LAB_00419948;

LAB_004199a8:

          *(int *)(iVar4 + 4) = piVar7[1];

        }

        else {

          if (sVar1 == 0) {

            dprintf(6,"dhcp6_ctl_readcommand","control channel was reset by peer");

            goto LAB_00419998;

          }

          uVar6 = piVar7[0x103];

          uVar5 = sVar1 + piVar7[0x104];

          piVar7[0x104] = uVar5;

          if ((int)uVar5 < (int)uVar6) goto LAB_00419890;

          if (uVar5 == 0xc) {

            uVar6 = CONCAT11(*(undefined1 *)((int)piVar7 + 0xe),*(undefined1 *)((int)piVar7 + 0xf))

                    + uVar6;

            piVar7[0x103] = uVar6;

            if (uVar6 == 0xc) goto LAB_00419a38;

          }

          else if (uVar5 == uVar6) {

LAB_00419a38:

            iVar4 = (*(code *)piVar7[0x105])(piVar7 + 3);

            if (1 < iVar4 + 1U) goto LAB_00419890;

            goto LAB_00419998;

          }

          if (uVar6 < 0x401) goto LAB_00419890;

          dprintf(6,"dhcp6_ctl_readcommand","too large command (%d bytes)");

          iVar4 = *piVar7;

          if (iVar4 != 0) goto LAB_004199a8;

LAB_00419948:

          DAT_0043cdd8 = piVar7[1];

        }

        *(int *)piVar7[1] = iVar4;

        FUN_00419778(piVar7);

      }

LAB_00419890:

      piVar7 = piVar8;

    } while (piVar8 != (int *)0x0);

  }

  return 0;

}